from what I read, you may need to see what the married code for child support is, the un-married seems to be talking about ilke if you had a GF and she has a child, yada yada...
try EVERYWAY possible to work it out with your GF without going to court
That's usually the best scenario, cause (sorryBM) most courts heavily fover the mothers
Explain you both need to do what's best for the child, not yourselves